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authorLinus Torvalds <torvalds@osdl.org>2005-10-23 14:30:45 -0700
committerJunio C Hamano <junkio@cox.net>2005-10-24 15:12:41 -0700
commit35eb2d36418a25f9e956b116a622d8d99f4abad9 (patch)
tree2ada0cb8fce070b6b2c56fa689791230636f1857 /shell.c
parent38cc7ab8144e111b47ac0ad3fcf6cb70d546e473 (diff)
downloadgit-35eb2d36418a25f9e956b116a622d8d99f4abad9.tar.gz
Add git-shell.
This adds a very git specific restricted shell, that can be added to /etc/shells and set to the pw_shell in the /etc/passwd file, to give users ability to push into repositories over ssh without giving them full interactive shell acount. [jc: I updated Linus' patch to match what the current sq_quote() does.] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'shell.c')
-rw-r--r--shell.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/shell.c b/shell.c
new file mode 100644
index 0000000000..2c4789e944
--- /dev/null
+++ b/shell.c
@@ -0,0 +1,59 @@
+#include "cache.h"
+#include "quote.h"
+
+static int do_generic_cmd(const char *me, char *arg)
+{
+ const char *my_argv[4];
+
+ arg = sq_dequote(arg);
+ if (!arg)
+ die("bad argument");
+
+ my_argv[0] = me;
+ my_argv[1] = arg;
+ my_argv[2] = NULL;
+
+ return execvp(me, (char**) my_argv);
+}
+
+static struct commands {
+ const char *name;
+ int (*exec)(const char *me, char *arg);
+} cmd_list[] = {
+ { "git-receive-pack", do_generic_cmd },
+ { "git-upload-pack", do_generic_cmd },
+ { NULL },
+};
+
+int main(int argc, char **argv)
+{
+ char *prog;
+ struct commands *cmd;
+
+ /* We want to see "-c cmd args", and nothing else */
+ if (argc != 3 || strcmp(argv[1], "-c"))
+ die("What do you think I am? A shell?");
+
+ prog = argv[2];
+ argv += 2;
+ argc -= 2;
+ for (cmd = cmd_list ; cmd->name ; cmd++) {
+ int len = strlen(cmd->name);
+ char *arg;
+ if (strncmp(cmd->name, prog, len))
+ continue;
+ arg = NULL;
+ switch (prog[len]) {
+ case '\0':
+ arg = NULL;
+ break;
+ case ' ':
+ arg = prog + len + 1;
+ break;
+ default:
+ continue;
+ }
+ exit(cmd->exec(cmd->name, arg));
+ }
+ die("unrecognized command '%s'", prog);
+}